CPC C23C 14/027 (2013.01) [B32B 15/04 (2013.01); C23C 14/0611 (2013.01); C23C 14/325 (2013.01); C23C 28/04 (2013.01); C23C 28/046 (2013.01); C23C 28/048 (2013.01)] | 20 Claims |
1. Part comprising a metal substrate, a non-hydrogenated amorphous ta-C or a-C carbon coating, coating the substrate, and a sub-layer based on chromium (Cr), carbon (C) and silicon (Si) disposed between the metal substrate and the amorphous carbon coating and on which the amorphous carbon coating is applied, wherein the sub-layer comprises the following atomic ratios at the sub-layer's interface with the amorphous carbon coating:
A ratio between the silicon content and the chromium content (Si/Cr) comprised between 0.35 and 0.60, and
A ratio between the carbon content and the silicon content (C/Si) comprised between 2.5 and 3.5.
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